. >> up next, a miracle rescue in japan. rescuers find two earthquake survivors nine days after that horrible earthquake and tsunami. also what u.c. berkeley scientists found after checking radiation levels in the air. >>> at last encouraging news about the crippled nuclear plant. japanese authorities just announced that two of the six units are now under control after the fuel storage pools have cooled down. there are new concerns about food and water safety, but first something uplifting. david wright shows us the rescue of two survivors more than a week after the massive earthquake hit. >> late today a dramatic bit of hopeful news, a miracle rescue. they freed an 80-year-old woman and grandson trapped since the tsunami. the two survived nine days eating yogurt from the fridge until the grandson stood on the rooftop. japanese coastguard released new video of the tsunami before it hit shore. as it passes right under the bow of coastguard cutter you get a sense of how enormous it is. on land they are still dealing with the d